若函数f(x)、g(x)在区间[a，b]上可导，且f′(x)＞g′(x)，f(a)＝g(a)，则在[a，b]上有                                                                                                                 (　　)

A．f(x)＜g(x)	B．f(x)＞g(x)
C．f(x)≥g(x)	D．f(x)≤g(x)